The U.S. ambassador to the United Nations said Friday there should no longer be any doubt that Russia intends to dismantle Ukraine “and dissolve it from the world map entirely.”

Linda Thomas-Greenfield told the U.N. Security Council that the United States is seeing growing signs that Russia is laying the groundwork to attempt to annex all of the eastern Ukrainian regions of Donetsk and Luhansk and the southern Kherson and Zaporizhzhia regions, including by installing “illegitimate proxy officials in Russian-held areas, with the goal of holding sham referenda or decree to join Russia.”